Zone 7a covers 30 days of last-frost dates. We measured Fayetteville, AR at Mar 31 and Ogden, UT at Apr 30. Give us your town or ZIP and we'll use ten years of daily lows recorded at your own coordinates instead of the middle of that range.
Why these dates work in zone 7a
Zone 7a's last spring frost averages Apr 13 and first fall frost Nov 12 — about 213 frost-free days. Lemon Balm tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall. Starting seeds indoors 6 weeks ahead gives strong transplants ready the moment the soil warms.
Common questions
How long does lemon balm take to grow in zone 7a?
Lemon Balm matures in about 60–90 days from transplanting. In zone 7a that means setting plants out around Apr 13 and first picking around Jun 12.
Will lemon balm survive frost in zone 7a?
Yes — lemon balm tolerates light frost. In zone 7a you can set plants out a little before the last frost (around Apr 13) and keep harvesting past the first fall frost (around Nov 12).
For soil, spacing, pests and companion planting, see the full lemon balm growing guide →